/*
 * Copyright 2015, The Querydsl Team (http://www.querydsl.com/team)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.querydsl.sql;

import com.querydsl.core.types.Ops;
import java.sql.Types;

/**
 * {@code H2Templates} is an SQL dialect for H2
 *
 * @author tiwe
 */
public class H2Templates extends SQLTemplates {

  @SuppressWarnings("FieldNameHidesFieldInSuperclass") // Intentional
  public static final H2Templates DEFAULT = new H2Templates();

  public static Builder builder() {
    return new Builder() {
      @Override
      protected SQLTemplates build(char escape, boolean quote) {
        return new H2Templates(escape, quote);
      }
    };
  }

  public H2Templates() {
    this('\\', false);
  }

  public H2Templates(boolean quote) {
    this('\\', quote);
  }

  public H2Templates(char escape, boolean quote) {
    super(Keywords.H2, "\"", escape, quote, false);
    setNativeMerge(true);
    setMaxLimit(2 ^ 31);
    setLimitRequired(true);
    setCountDistinctMultipleColumns(true);

    setPrecedence(Precedence.ARITH_LOW + 1, Ops.CONCAT);
    setPrecedence(Precedence.COMPARISON, Ops.EQ, Ops.EQ_IGNORE_CASE, Ops.NE);

    add(Ops.MOD, "{0} % {1}", Precedence.ARITH_HIGH);

    add(Ops.MathOps.ROUND, "round({0},0)");
    add(Ops.TRIM, "trim(both from {0})");

    add(Ops.DateTimeOps.DAY_OF_WEEK, "day_of_week({0})");

    add(Ops.MathOps.LN, "log({0})");
    add(Ops.MathOps.LOG, "(log({0}) / log({1}))");
    add(Ops.MathOps.COTH, "(cosh({0}) / sinh({0}))");

    add(Ops.DateTimeOps.DATE, "convert({0}, date)");

    addTypeNameToCode("result_set", -10);
    addTypeNameToCode("identity", Types.BIGINT);
    addTypeNameToCode("uuid", Types.BINARY);
    addTypeNameToCode("serial", Types.INTEGER);
    addTypeNameToCode("varchar_ignorecase", Types.VARCHAR);

    add(Ops.DateTimeOps.TRUNC_YEAR, "parsedatetime(formatdatetime({0},'yyyy'),'yyyy')");
    add(Ops.DateTimeOps.TRUNC_MONTH, "parsedatetime(formatdatetime({0},'yyyy-MM'),'yyyy-MM')");
    add(Ops.DateTimeOps.TRUNC_WEEK, "parsedatetime(formatdatetime({0},'YYYY-ww'),'YYYY-ww')");
    add(Ops.DateTimeOps.TRUNC_DAY, "parsedatetime(formatdatetime({0},'yyyy-MM-dd'),'yyyy-MM-dd')");
    add(
        Ops.DateTimeOps.TRUNC_HOUR,
        "parsedatetime(formatdatetime({0},'yyyy-MM-dd HH'),'yyyy-MM-dd HH')");
    add(
        Ops.DateTimeOps.TRUNC_MINUTE,
        "parsedatetime(formatdatetime({0},'yyyy-MM-dd HH:mm'),'yyyy-MM-dd HH:mm')");
    add(
        Ops.DateTimeOps.TRUNC_SECOND,
        "parsedatetime(formatdatetime({0},'yyyy-MM-dd HH:mm:ss'),'yyyy-MM-dd HH:mm:ss')");
  }

  @Override
  public String serialize(String literal, int jdbcType) {
    switch (jdbcType) {
      case TIMESTAMP_WITH_TIMEZONE:
        return "(timestamp with time zone '" + literal + "')";
      case TIME_WITH_TIMEZONE:
        return "(time with time zone '" + literal + "')";
      default:
        return super.serialize(literal, jdbcType);
    }
  }
}
